The owners of a waterpark are taking a survey to determine how many trips to the park kids in the area take during the summer. they take a survey of kids entering the park on a monday. is this a good sampling method?

No, it is not because of the day of the week. Many children are less likely to go to the water park on a weekday because they have to go to school. It would be a better sampling method to go over the weekend and take a survey, so that it simulates the summer, where children have more personal time.